1D Motion
Newton's law and forces
2D Motion
Momentum
Energy, Work and Power
100
If an object has a constant velocity, what can be said about its acceleration?
The acceleration is zero
100
A child riding a merry-go-round feels a centripetal force.How would the magnitude of the acceleration change if the velocity doubled (2x)?
quadrupled (4x)
100
The horizontal acceleration of a projectile is ALWAYS
ZERO
100
What is an object’s change in momentum equal to?
the impulse acting on the object
100
What is the kinetic energy of a 60 kg man running at 8 m/s?
K=1920 joules
200
Displacement is a vector quantity because it includes information about:
Magnitude and direction
200
If the car is traveling around a curve of 50m radius at a velocity of 10 m/s, what is the centripetal acceleration of the car?
2 m/s
200
For a projectile, which velocity remains constant as long as air resistance is ignored?
Horizontal
200
An object has a mass of 100 kg moving at 5m/s. What is the linear momentum of the object?
P=500 kg m/s
200
An 8 kg dog is running at 4 m/s. What is the kinetic energy of the dog?
64 joules
300
(Z) What is the difference between speed and velocity?
Speed represents the total distance covered, while velocity represents the change in position
300
If the car of 75kg is traveling around a curve of radius of 50m at a velocity of 15 m/s, what is the centripetal force of the car?
337N
300
A football was kicked toward the goal. The horizontal component of velocity was 10 m/s and the vertical component was 7 m/s . What is the magnitude of the resultant velocity of the soccer ball?
12 m/s
300
Egg A is dropped from a height of 1m onto the floor. Egg B is dropped from a height of 1m into a bucket of water. Which statement correctly describes why Egg B does not break?
Egg B experiences less force over a longer time
300
Calculate the kinetic energy of a car of mass 750 kg moving with a velocity of 54 km per hour.
K=84375 J
400
A physics teacher moves once around the perimeter of a rectangular table with dimensions 1 m by 2 m. What is the teachers final displacement?
0 m
400
If the car of 100 kg is traveling around a curve of radius of 20m at a velocity of 60 m/s, what is the centripetal force of the car?
18000 N
400
You drop a package from a plane flying at a constant speed in a straight line. Without air resistance, the package will...
Remain vertically under the plane while falling
400
What is the momentum of a 5.0-kg brick moving through the air at 10 m/s?
50kg m/s
400
How high does a 0.4 kg piece of cheese need to be raised above the ground for the cheese-Earth system to have a gravitational potential energy of 25 J?
6.37 m
500
If you are riding on a bus with a friend, you can tell you are moving by observing the motion of objects like trees and houses outside the windows. What is your frame of reference for detecting the motion of the bus?
(a.objects outside the windows.(b.your friend.(c.seat on the bus.(d.the bus driver
a.objects outside the windowsDisplacement**
500
A truck of a mass of 4,600 kg accelerates at 3.2 m/s2. What is the resultant force acting on the car?
14,720 N
500
At what angle can a projectile be launched in order to travel the greatest distance?
45 degrees
500
A dad on ice skates is quickly moving forward. He child is in front of him going slowly in the same directions. As he catches up, he scoops the child into his arms. What will happen next?
The dad and the child still move forward but at a slower velocity.
500
A water balloon has a mass of 2,000 grams. How much energy is needed to throw it with a velocity of 6.7 m/s?
44.89 Joules